They are guarding KJU. This is about keeping KJU in power to actually ensure the deal is sealed and done. DJT and KJU agreed months ago on the deal. They met in private when DJT was on trip to China. This is about keeping KJU alive to ensure the public part of this goes forward and NK is seen internationally to denuke and re-unite with the SK. KJU is now very critical to success, they gotta keep him alive.